LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2009 >> M3 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 73 (Engine Electrical System - Repair - E90) >> Switches And Relays >> 12 63 520 Replacing DME master relay (S65)

12 63 520 Replacing DME master relay (S65)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks: 

Remove DME master relay (1).

Fig 1: Identifying DME Master Relay
G06203472Courtesy of BMW OF NORTH AMERICA, INC.

Notes on troubleshooting: 

If the starter motor cranks the engine during the starting sequence but the engine fails to fire, then:

  1. Check engine fuses
  2. If the fuses have blown, replace them completely with the fuse holder
  3. Find out why fuses have blown

Continue troubleshooting as per DIS instructions.